Momentary action electric switch



April 30, 1940. J. DE VINCENZI MOMENTARY ACTION ELECTRIC SWITCH INVENTOR.

A ATTORNEYS.

Filed March 28, 1939 Patented Apr. 30, 1940 MoMEN TARi'n oTmN ELECTRIO SWITCH John Dc Yincenzi, New Y ork N. Y, I i h Application arch 28;1939, Serial mlzsaszv v E}; ha (01. 200 159) i This invention relates to electric switches, and has for its main object to provide a switch which will close the electric circuit for a short timeiso to say,for,amoment only at one operation and in which it will be practically impossible to cause thesame to close the circuit for alonger time. Another object of this invention is .to'provide an electric switch as characterized hereinbefore, Which. at every operation will close the circuit (1 twice, but at each tim'efor said momentary short interval only. l 1 l Still further .objects of my invention will be apparent. as "thespecification of the same proceeds,"and.garnongothers I may mention: .topro 5 vide anelectrical switchof this type which will be simple in construction, inexpensive to i manufacture, easy to install, reliable and positive in .itsaction. i i QIn the -drawing'forming a part of this specification and accompanying thesamez f i j Fig. 1 is a side elevation .ofone embodiment of my novel electrical switch; Fig. 2 is afront elevation thereof,and

Fig. 3 is asectional elevatiomthe se'ction bein 5 taken on the line 3-3 of Fig. 2. r Fig. l is a sideelevation of another ment of my invention, and 1 i W "g. 5 is afront elevation thereof}. j i Fig. 6 is a sectional elevation, thesection being 3. taken on the line GEi ofFig. 5; W Fig. 7 is an elevation of the inner side of one member of my .devicepthe other member thereof having been-removedand my switch beingshown injitsnormal position; M f 5 Fig.8 is asimilar view to that of Fig [the switch being shown in the position'jit would as sume when its push buttonor pin=is pressed inwardly to its limit; J I:

.Fig. 9 is an elevation of the inner side 1 other member of my switch, and 1 J h Fig. 10 is a sectional detail showing the arrangement of a pivoted conductor lever on said push button or in. l i 3 Referring now to the drawingmorein detail by 3 characters of reference, the first embodiment of my device, shown in Figs. 1 to 3, is housed in a rectangular insulating blocklll of any appropriate material. A bore H is provided in the block in which may slidably reciprocate the push J button or pin i2 of insulating material, said push button,.however, having a ring i 13 of electroconductive material arranged at an appropriate portion thereof, as will beunderstood bythose versed in this art. A helical springM is ari ranged inthebore II, back of the push button of the embodior pin l2, normally tending to push the same. outwardly. An appropriate plate l5. may be secured on the front of the insulatingblock ID as by the screws [6, the whole device to besecured. at the place of its use, like in a door frame for a bell, by using the holes I! in the plate l5, as for instance, for securing screws. The push button or pin I2 has a reduced front portion l8 project ingthrough an appropriate hole It in the plate 15 and theshoulder between the wider and reduced portions of said push button. I2 will provide a limit to the outward movement thereof under the action of the helical spring I4, since the hole is is made smaller than the wider portion ofthepinIZ. W Two oppositely placed triangular slots 2! are provided in the block. In, their narrow lower terminations 22 opening into the bore H and an appropriately. bent resilient electro-conductive member 23 is secured in each slot 2 I in the manner shown in thedrawing, the end 24 thereof being secured by the screws 25 on the block"),

while the triangular bent inner end 26 of the same is free and may be moved somewhat outwardly through the resilient characterof the material of said electro-conductive members 23.

It also will be understood that the innermost tip 321 of each electro-conductive strip of mate rial 23.norina1ly will have the tendency to project into the. space within the bore 1 l, but will 5 be prevented "therefrom when the pin I2is ar ranged insaid bore, as shown in Fig. 3, and said tips 21 will be. resting against the sliding pin l2 through theirresilient action. The two terminations. ofan electrical circuit which it is desired ton. is pressed inwardly as indicated by the arrow 30,, and as it is usual, the electro-conductive ring I3 will pass between the tips 2? of the conductor strips 23. and during its passing between them,

will close the circuit. This passing may take a 5 very short time, depending on the speedof push ing the pin l2 inwardly, and as soonas the ring i3 is beyond the tips 21, the circuit will again be broken. Upon'relieving the pressure on' the sliding pin or button I2, coiledspring l4 willshoot the same forwardly, back into its normal position, and the ring l3 will again "pass, for a moment, between the tips 21, and will again,

. for that moment, close the circuit.

It will be seen that my device will close the circuit automatically twice for each pressure on the push button l2, and each time for avery short time only. a

It also will be seen that it will be practically impossible to close the circuit for a longer time through my device, since the operator thereof for this purpose would have to keep the push button [2 exactly in the position where the ring 13 makes the connection between the two electroconductive strips 23. I

A long continued ringing of a'door bell is a great nuisance and sometimes even more serious, like in a case when a sick person is affected thereby, and my device will make impossible a continued ringing of the bell except by design and even then will make it almost impossible, while, on the other hand, it will insure two very short distinct signals. r a It also will be obvious that my device may be used at many other occassions where such an effect is necessary or desirable. I

In Figs. 4 to 9, I show a second embodiment of my device.

.lyin the member 32 and partly in the member 33 as shown in Figs. 5 and 7, 8, 9. A sliding push button or pin 36 is arranged in the bore 35 normally being urged in an outwarddirection by the coiled spring 3'I. I

Two inwardly open triangular slots 38 are pro-- vided in the opposite sides of. the upper portion of the conductor block 3|, each having a resilient conductor strip 39 arranged therein, somewhat similar to the conductor strips 23 described in connection with the first embodiment of my device, shown in Figs. 1 to 3, and the terminations of the electric circuit to be closed by my switch are secured to the outer secured ends 42 of the respective conductor strips 39, while the triangular bent portions of said conductor strips 39 are free and resilient, and their innermost tips 43are in close proximity to one another. shaped hollow space 44 is provided in the member 32', the construction and purpose of which will be described presently, and the meeting tips 43 of the conductor strips 39 are projecting into said space 44, as best shown in Fig. 6. I

The upper portion of said space or recess 44 in insulating member 32 (Figs. 7 and 8) is formed with two converging sides 45 and 46 and the lower part thereof is formed with two outwardly inclined sides 41 and 48, said sides entering into the bore 35 and the space 44 at its lower ends communicating with said bore, as shown.

The inner end of the slide pin 36 is slotted as at 49, and an electro-conductive lever 50 is set into said slot rockable on a pin 5|,

, Normally, my device is in the position shown in Fig. '7 and it will be seen that the pin 36 is pushed outwardly by the spring 31, conductive lever 50 restingagainst the inner upper side 45 of the space 44. When the push button 36 is pressed inwardly to its limit, compressing the spring 31, lever 50 will be rocked and will take,

A peculiarly up the position shown in Fig. 8, resting against the other side 46 of said space 44, and it will be seen that during such rocking and such movement of the pin 36 inwardly, lever 56 will have to pass between the inner tips 43 of the electroconductive strips 39 and will close the circuit for that moment.

When the pressure is released on the pin 36,

coil spring 31 will push the same outwardly into its normal position shown in Fig. 7, lever 50 again taking up its position shownin Fig; 7, and it will be obvious that during such return of the pin 36, the lever 50 again will pass for a moment between said resilient and yielding conductor tips 43 and will again close the circuit for said moment of an electric bell, buzzer, bulbjoran electric signal device, will make two short closings of the circuit,,one on the inward movement of the push pin, and one on the'outwardmovement thereof; The devices which are fedby said circuit will therefore be operative for two very short periods of time, only. I a I It is well known that some such devices, particularly door bells, and the like, are greatly abused today. The bell buttons are pushed to the limit and are kept there, making a long annoying" continuous ring, With my device, two very short rings will be produced with every pushing in and releasing of the bell button, no matter how long the push button is kept pressed inwardly. Similarly, a light or signaling device will be used only for two short periods of time, thereby effecting a great saving, and more efficient and less annoying operation.

With my device, the short operation of the electric circuit may also be easily regulated and adjusted. The widths of the metal ring around the pin in the first embodiment of my device may be made of different dimensions, and similarly, the widths of the rocking armin. the second embodiment thereof. By changing the widths of the resilient circuit terminals, the length of the push pin, the amount of its protruding end,

the relative placing of the terminals, and of the active member on the pin, and so on, various timings and lengths for the operation of the device fed by the electric circuit may be produced.

What I claim as new, is:

1, A momentary action repeating electric switch, comprising an insulated housing, a movable element in said housing operable by a part thereof projecting from the housing, a resilient member urging said element outwardly of said housing, alimit to the outward movement of said element, said element being adapted tobe moved inwardly against said resilient member, an electro-conductive closing. member carried by said movable element, two electrical terminations in said housing for the circuit of the switch, said electro-conductive closing member normally being out of contact with said terminations but being adapted to contact them. and close the circuit for a pre-determined short time interval dur-' ing the inward travel of said movable element, said movable element upon its release'being auto- 2,198,659 matically returned by said resilient member, and r i said electro-conductive closing member thereon once more establishing contact'with said terminations for a pre-determined short time interval during its return travel, said movable element being in the form of a slide pin, said terminations being formedby V shaped resilient metal strips projecting into said housing, and said electro conductive closing member being in the form of a rockable arm pivoted in said pin, a recess in i said housing for said arm, means to cause said arm to swing in one direction upon the inward travel of said pin, and to cause the same to swing in the other direction upon the return of said pin, said arm passing between the innermost points of said Vshaped conductor springs, and

brushing against both of them, upon each of its inward and return travels, respectively.

2. In an electric switch as set forth in claim 1, said meansto cause said arm to swing in one direction or in the other, comprising inwardly inclined concave generally V shaped sides for said recess, the inward pointsof said sides acting as pivots for said arm upon the travels of said pin, and their respective inner and outer inclined portions acting as limits for the swings of said arm.

3. A momentary action repeating electric switch, comprising a block of insulating material A for a housing, a hole being provided in said block from the front surface thereof, a sliding pin in said hole projecting beyond said front surface, a helical spring in said hole to the rear of said pin urging said pin in an outward direction, a V

shaped recess in the top of said block, the lower apex thereof communicating with said hole, a similar but inverted V shaped recess in the bottom of said block also communicating with said hole, a V shaped yielding resilient conducting member in said upper recess, its apex projecting into said hole and into the path of said sliding pin, a similar but inverted V'shaped resilient yielding conductor member in said lower recess.

its apex also projecting into the path of said sliding pin, and an electro-conductive bridge 

